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Table 1 Calibration points used for relaxed Bayesian molecular clock analyses

From: The diversity and evolution of chelicerate hemocyanins

Split

Bounds

 

Strata

Fossils

Reference

 

Max

Min

   

Euchelicerata-Pycnogonida

543

501

lower bound: first arthropods in the Early Cambrian

upper bound: base of Upper Cambrian

Rusophycus; Cambropycnogon klausmuelleri

Benton 1993 [41], Crimes 1987 [45], Waloszek and Dunlop 2002 [46]

origin of Xiphosura

 

445

Late Ordovician

Lunataspis aurora

Rudkin et al. 2008 [47]

origin of Scorpiones

 

428

Silurian

Allopalaeophonus caledonicus

Dunlop 2010 [43]

Mygalomorphae-Araneaomorphae

382.7

240

lower bound: Grès à meules, upper Buntsandstein, Trias;

upper bound: Givetian, middle Devonian

Rosamygale grauvogeli;

Attercopus fimbriunguis

Selden and Gall 1992 [48], Selden et al. 2008 [49]